Rumors about a Mazda RX-8 successor have been swirling for years but new details are starting to emerge about the often talked about, never seen model.

Rumors about a Mazda RX-8 successor have been swirling for years but new details are starting to emerge about the often talked about, never seen model.

According to Autoweek, Mazda is working on a new RX-7 which could use a naturally-aspirated rotary engine with two or three rotors. The engine is expected to have a displacement of roughly 1.2 liters and an output of approximately 250 bhp (186 kW). It should also be more reliable and fuel-efficient that the oil and gas guzzling engine that was used in the RX-8.

Given the MX-5 is expected to tip the scales at anywhere from 2,200 to 2,400 pounds (998 to 1088 kg), the RX-7 is expected to weigh about 2,800 pounds (1,270 kg).

If everything works out, the RX-7 could be launched in 2015 or 2016 and cost around $30,000.